CN114071727A

CN114071727A - Communication method and device

Info

Publication number: CN114071727A
Application number: CN202010761194.2A
Authority: CN
Inventors: 杜静; 何朗; 吴海倩; 屈江
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2022-02-18

Abstract

A communication method and a communication device are used for configuring carriers occupied by corresponding physical downlink control channels for terminal equipment, so that the coverage capability of a Physical Downlink Control Channel (PDCCH) can be improved, the demodulation success rate of the terminal equipment is improved, and the transmission delay is reduced. The method comprises the following steps: the network equipment determines first information, wherein the first information is used for indicating a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set comprises at least one carrier; the network equipment sends the first information to terminal equipment; and the terminal equipment blindly detects the downlink control information in the PDCCH on the at least one carrier according to the first information. Therefore, the PDCCH can be transmitted on at least one carrier, the covering capability of the PDCCH can be improved, the demodulation success rate of the terminal equipment is improved, and the transmission delay is reduced.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

One of the main features of narrowband systems (e.g., private power networks, etc.) is narrowband. For example, in private power networks with a spectrum of 230 mega (M) or 400M, the bandwidth of the carrier spectrum is typically only 12.5kHz or 25 kHz. Such spectrum wireless communication protocols generally need to improve the coverage capability of a wireless control channel by expanding time domain resources, for example, a single scheduling unit of a network device generally selects a 10 millisecond (ms) or 20ms granularity level, and is not suitable for defining a 1ms scheduling granularity by adopting a 3GPP protocol. In the remote service scene of the internet of things, the demodulation success rate of the terminal equipment is generally improved through repeated transmission for multiple times in the time domain, so that the coverage capability of a wireless control channel is improved. However, the change of the scheduling unit may bring a certain influence on the overall service delay, and when the remote service of the internet of things needs to be repeatedly transmitted for many times, the delay may be increased.

Disclosure of Invention

The application provides a communication method and device, which are used for configuring a carrier occupied by a corresponding Physical Downlink Control Channel (PDCCH) for a terminal device, so that the coverage capability of the PDCCH can be improved, the demodulation success rate of the terminal device is improved, and the transmission delay is reduced.

In a first aspect, the present application provides a communication method, which may include: the method includes the steps that a network device determines first information, wherein the first information is used for indicating a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set comprises at least one carrier; and the network equipment sends the first information to terminal equipment.

By the method, the PDCCH is transmitted in a carrier aggregation manner in a frequency domain, so that the covering capability of a physical control channel can be improved, subsequent terminal equipment can perform blind detection on Downlink Control Information (DCI) on at least one carrier, the demodulation success rate of the terminal equipment can be improved, and the transmission delay is reduced.

In one possible design, the number of the at least one carrier is related to a service type of the terminal device; when the service type of the terminal equipment is a delay sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal equipment is a time delay insensitive service type, the number of the at least one carrier is a second value; wherein the first value is greater than the second value.

By the method, the terminal equipment of the service type sensitive to the time delay can blindly detect the DCI in the PDCCH on more carriers on the frequency domain, thereby improving the demodulation success rate and reducing the transmission time delay.

In one possible design, the number of the at least one carrier is related to the distance between the terminal device and the network device; when the terminal equipment is at a first distance from the network equipment, the number of the at least one carrier is a third value; when the terminal equipment is at a second distance from the network equipment, the number of the at least one carrier is a fourth value; wherein the first distance is greater than the second distance, and the third value is greater than the fourth value.

By the method, the far-end terminal equipment can perform blind detection on the DCI in the PDCCH on more carriers in the frequency domain, so that the demodulation success rate is improved, and the transmission delay is reduced.

In one possible design, the first information is further used to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in the time domain. Therefore, the time-frequency resources of the PDCCH can be flexibly configured in the frequency domain and the time domain, so that the subsequent demodulation success rate of the terminal equipment is higher.

In one possible design, the number of repeated transmissions of the PDCCH in the time domain is related to a service type of the terminal device; when the service type of the terminal equipment is a delay sensitive service type, the number of times of repeated transmission of the PDCCH in the time domain is a fifth value; when the service type of the terminal equipment is a service type which is not sensitive to time delay, the repeated transmission times of the PDCCH on the time domain is a sixth value; wherein the fifth value is less than the sixth value.

By the method, the PDCCH code rate can be reduced and the UE PDCCH demodulation success rate can be improved on the basis of not responding to the time delay of the terminal equipment of the service type of the time delay sensitive type; for non-delay sensitive service types, the time-frequency resource of the PDCCH is flexibly configured in the frequency domain and the time domain, so that the coverage capability of the cell downlink PDCCH can be improved.

In one possible design, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; when the terminal device is a third distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is a seventh value; when the terminal device is a fourth distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is an eighth value; wherein the third distance is greater than the fourth distance, and the seventh value is greater than the eighth value. Therefore, the problem that the services of some remote terminal equipment cannot be accessed can be reduced.

In a second aspect, the present application provides a method of communication, which may include: the method comprises the steps that terminal equipment receives first information from network equipment, wherein the first information is used for indicating a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set comprises at least one carrier; and the terminal equipment blindly detects the downlink control information DCI in the PDCCH on the at least one carrier according to the first information.

By the method, the PDCCH is transmitted in the frequency domain in a carrier aggregation manner, so that the covering capability of the physical control channel can be improved, subsequent terminal equipment can perform blind detection on the DCI on at least one carrier, the demodulation success rate of the terminal equipment can be improved, and the transmission delay is reduced.

In one possible design, the first information is further used to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in a time domain; further, the terminal device blindly detects DCI in the PDCCH repeatedly transmitted each time according to the number of times of repeated transmission of the PDCCH in the time domain. Therefore, the time-frequency resources of the PDCCH can be flexibly configured in the frequency domain and the time domain, so that the subsequent demodulation success rate of the terminal equipment is higher.

In one possible design, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; when the terminal device is a third distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is a seventh value; when the terminal device is a fourth distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is an eighth value; wherein the third distance is greater than the fourth distance, and the seventh value is greater than the eighth value.

Therefore, the problem that the services of some remote terminal equipment cannot be accessed can be reduced.

In a third aspect, the present application further provides a network device having a function of implementing the network device in the method example of the first aspect or the second aspect. The corresponding functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In a possible design, the structure of the network device includes a processing unit and a transceiver unit, and these units may perform corresponding functions in the method example of the first aspect or the second aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In a possible design, the network device includes a transceiver and a processor, and optionally may further include a memory, the transceiver is configured to transmit and receive data or information and perform communication interaction with other devices in the communication system, and the processor is configured to support the network device to perform corresponding functions of the network device in the method of the first aspect or the second aspect. The memory is coupled to the processor and holds the program instructions and data necessary for the network device.

In a fourth aspect, the present application further provides a terminal device, which has a function of implementing the terminal device in the method example of the first aspect or the second aspect. The corresponding functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In a possible design, the structure of the terminal device includes a processing unit and a transceiver unit, and these units may perform corresponding functions in the method example of the first aspect or the second aspect, for specific reference, detailed description in the method example is given, and details are not repeated here.

In a possible design, the structure of the terminal device includes a transceiver and a processor, and optionally may further include a memory, the transceiver is configured to transmit and receive data or information and perform communication interaction with other devices in the communication system, and the processor is configured to support the terminal device to perform corresponding functions of the terminal device in the method of the first aspect or the second aspect. The memory is coupled to the processor and retains program instructions and data necessary for the terminal device.

In a fifth aspect, the present application further provides a communication system comprising at least one of the terminal devices and the network device mentioned in the above design. Further, the network device in the communication system may perform any one of the methods of the first aspect or the second aspect described above, and the terminal device in the communication system may perform any one of the methods of the first aspect or the second aspect described above, which is performed by the terminal device.

In a sixth aspect, the present application provides a computer-readable storage medium having stored thereon computer-executable instructions for causing a computer, when invoked by the computer, to perform any of the methods of the first or second aspects described above. By way of example, computer readable storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: a computer-readable medium may include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In a seventh aspect, embodiments of the present application provide a computer program product comprising computer program code or instructions, which when run on a computer, causes the computer to implement the method of the first aspect and any possible design thereof, the second aspect and any possible design thereof described above.

In an eighth aspect, the present application provides a chip, coupled to a memory, for reading and executing program instructions stored in the memory to implement the method of the first aspect and any possible design thereof, the second aspect and any possible design thereof.

For each of the third to eighth aspects and possible technical effects of each aspect, please refer to the description of the possible technical effects for each possible solution in the first or second aspect, and no repeated description is given here.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system provided in the present application;

fig. 2 is a schematic diagram of discrete carrier aggregation provided herein;

fig. 3 is a schematic diagram of a blind detection process of a terminal device according to the present application;

fig. 4 is a flow chart of a communication method provided herein;

fig. 5 is a schematic diagram of blind detection DCI by a terminal device according to the present application;

fig. 6 is a schematic structural diagram of a network device provided in the present application;

fig. 7 is a schematic structural diagram of a terminal device provided in the present application;

FIG. 8 is a block diagram of a network device provided herein;

fig. 9 is a structural diagram of a terminal device provided in the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application provides a communication method and device, which are used for configuring a carrier occupied by a corresponding Physical Downlink Control Channel (PDCCH) for a terminal device, so that the coverage capability of the PDCCH can be improved, the demodulation success rate of the terminal device is improved, and thus the transmission delay is reduced. The method and the device are based on the same technical concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

Fig. 1 shows an architecture of a possible communication system to which the communication method provided in the embodiment of the present application is applicable. The communication system is a narrowband communication system. The communication system may include a network device and at least one terminal device. Wherein:

the network device is a device with a wireless transceiving function or a chip that can be set in the network device, and the network device includes but is not limited to: a base station (gbb, eNB), a Radio Network Controller (RNC), a Node B (Node B, NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved NodeB or home Node B, HNB), a baseband unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), and/or the like, and a network Node constituting the gbb or the transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU), and/or the like.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered to be transmitted by the DU or by the DU + RU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. The CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited to this.

The terminal equipment may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. In the present application, a terminal device having a wireless transceiving function and a chip that can be installed in the terminal device are collectively referred to as a terminal device.

In the communication system, different terminal devices are at different distances from the network device, e.g. terminal device 1 shown in fig. 1 is at a greater distance from the network device than terminal device 2. Thus, the terminal device 2 can be regarded as a remote terminal device with respect to the terminal device 1.

In the communication method provided in the embodiment of the present application, the network device and the terminal device both support a carrier aggregation technology, the network device supports carrier bonding scheduling of a PDCCH, and the terminal device supports vertical blind detection of different carrier bindings.

It should be noted that the communication system shown in fig. 1 is only an example, and the application does not limit the number and layout of devices in the communication system.

At present, narrow-band systems, such as private power networks of 230M or 400M spectrum, have one of the features of narrow-band: the typical carrier spectrum bandwidth is only 12.5kHz or 25 kHz. Such spectrum wireless communication protocols generally require that the coverage of the radio control channel be enhanced by extending the time domain resources. For example, a network device single-time scheduling unit may tend to select a 10ms or 20ms granularity level, not appropriate for defining a 1ms scheduling granularity with 3GPP protocols. The change of the scheduling unit brings certain influence to the whole time delay of the service, and especially, the terminal equipment can successfully demodulate the remote service of the internet of things by repeatedly transmitting the remote service of the internet of things, so that the time delay is further increased.

Another feature of private power grids in the 230M or 400M spectrum is the discreteness: the effective carriers are not continuous and discretized in the physical air interface frequency domain, and therefore, the carriers need to be bundled (i.e., aggregated) by using a discrete carrier aggregation technology, so as to improve the capability of single-terminal device one-time scheduling transmission in an air interface narrowband scene or reduce the transmission code rate, and improve the coverage capability, as shown in the schematic diagram of discrete carrier aggregation in fig. 2. As can be seen from fig. 2, different numbers of carrier aggregations are respectively performed in the frequency domain according to different requirements.

Due to the introduction of the discrete carrier technology, the wireless physical control channel can consider that only the narrowband internet of things (NB-IoT) technology is no longer used on the power private network narrowband spectrum, the demodulation requirements of the terminal devices in different coverage areas can be adapted by adopting different repetition frequency changes, the coverage capability of the narrowband system control channel can be further improved by considering the longitudinal carrier resource binding (i.e. carrier aggregation) dynamic adjustment mode, and the demodulation success rate of the terminal devices can be improved.

Currently, in an LTE system, different aggregation levels (aggregation levels) L ∈ {1,2,4,8} are defined for a PDCCH, which is used for a wireless physical control channel to meet demodulation requirements of different coverage terminal devices. Such as shown in table 1.

TABLE 1 PDCCH candidates monitored by a UE

In an NB-IoT system, NPDCCHs (wireless physical control channels) define different aggregation levels (aggregation levels) and different repetition levels (repetition levels) R ∈ {1,2,4,8,16,32,64,128,256,512,1024,2048} to meet the demodulation requirements of different coverage terminal devices. Such as shown in table 2.

TABLE 2 NPDCCH UE-specific search spaces candidates (specific UE NPDCCH search space candidates)

Similar NB-IoT technology is used in the private power network, and the demodulation requirements of different coverage terminal devices are met by adopting the dynamic adjustment frame repetition number (repetition number). Such as shown in table 3.

TABLE 3 PDCCH UE-specific search spaces candidates

At present, the existing narrowband system increases the coverage capability of a wireless control channel by using a NB-IoT traditional dynamic adjustment mode of the repetition times in the time domain (horizontal direction), and does not fully exert the technical advantages of narrowband discrete carrier aggregation. The network device configures the maximum repetition number Rmax of the PDCCH to be 8, and for a near-end terminal device, a middle-end terminal device and a far-end terminal device (where the near-end, the middle-end and the far-end terminal devices are determined by the distance between the terminal device and the network device), the terminal device uses different PDCCH repetition numbers R to achieve successful demodulation of Downlink Control Information (DCI) of the terminal device, so as to achieve balance between system capacity and service coverage. For example, the near-end terminal device uses PDCCH with repetition number R equal to 1, the middle-end terminal device uses PDCCH with repetition number R equal to 2, and the far-end terminal device uses PDCCH with repetition number R equal to 8. Under the mechanism, the remote terminal device needs 8 frames in the PDCCH scheduling period to successfully resolve the DCI, the blind detection process of the terminal device in this scenario may be as shown in fig. 3, the terminal device may perform blind detection 15 times at maximum in the scheduling period, and the DCI belonging to the remote terminal device may be blind detected at the last time in the scheduling period. This results in a large transmission delay.

Based on this, the present application provides a communication method, which can introduce a technology for dynamically adjusting carrier binding number (aggregation number) in a control channel frequency domain (longitudinally) on the premise that a narrowband system supports carrier aggregation, so as to improve the coverage capability of the control channel, improve the demodulation success rate of the terminal device, and reduce transmission delay. Meanwhile, the covering capability of the control channel can be further improved by combining the original horizontal (time domain) repetition frequency dynamic adjustment mode.

In the present application, both the terminal device and the network device may support a first PDCCH candidates (PDCCH candidates) scheme, which is newly proposed in the present application and may also be referred to as NEW PDCCH CANDIDATES scheme, and a second PDCCH candidates scheme, which is a multiplexing existing scheme and may also be referred to as OLD PDCCH CANDIDATES scheme. Specifically, the NEW PDCCH CANDIDATES mode and the OLD PDCCH CANDIDATES mode can be respectively shown in table 4 and table 5 below.

TABLE 4 NEW PDCCH CANDIDATES

TABLE 5 OLD PDCCH CANDIDATES

Further, based on the two PDCCH candidate manners, the present application can be divided into the following two application scenarios:

application scenario 1: in a narrow-band system, a network device can preferentially select NEW PDCCH CANDIDATES mode to perform wireless physical control channel resource scheduling for delay sensitive services, a terminal device supports blind detection in a frequency domain position, and different carrier aggregation (binding) can reduce PDCCH channel code streams, thereby ensuring that the demodulation success rate is improved under the condition that the scheduling delay is not increased for far-end service sensitive services.

Application scenario 2: in a narrow-band system, for non-delay sensitive services, network equipment can be used in a superposition NEW PDCCH CANDIDATES mode under the condition that the basis of an OLD PDCCH CANDIDATES mode still cannot meet the coverage range, so that the performance of wireless coverage is improved.

The delay-sensitive service may include a fine control service, a power distribution service (e.g., power generation, power transmission, power utilization, etc.), and the like, where the fine control service generally requires a delay time of less than 30 milliseconds (ms), and the power distribution service generally requires a delay time of less than 100 ms. The non-delay sensitive service may include a service (e.g., meter reading, etc.), and is generally required to be less than 2 s.

In order to more clearly describe the technical solutions of the embodiments of the present application, the following describes in detail a communication method and apparatus provided by the embodiments of the present application with reference to the accompanying drawings.

The communication method provided by the embodiment of the application can be applied to the communication system shown in fig. 1. Referring to fig. 4, a specific process of the method may include:

step 401: the network equipment determines first information, wherein the first information is used for indicating a carrier candidate set occupied by a PDCCH (physical downlink control channel), and the carrier candidate set comprises at least one carrier.

Step 402: and the network equipment sends the first information to terminal equipment.

Step 403: and the terminal equipment blindly detects the DCI in the PDCCH on the at least one carrier according to the first information.

In an optional implementation manner, the number of the at least one carrier is related to a service type of the terminal device; exemplarily, when the service type of the terminal device is a delay-sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal equipment is a time delay insensitive service type, the number of the at least one carrier is a second value; wherein the first value is greater than the second value.

In another optional implementation, the number of the at least one carrier may also be related to the distance between the terminal device and the network device (i.e., the terminal devices with different coverage levels); illustratively, when the terminal device is a first distance away from the network device, the number of the at least one carrier is a third value; when the terminal equipment is at a second distance from the network equipment, the number of the at least one carrier is a fourth value; wherein the first distance is greater than the second distance, and the third value is greater than the fourth value.

Of course, the two optional embodiments may be implemented in combination, that is, the number of the at least one carrier is configured jointly by considering the service type of the terminal device and the distance between the terminal device and the network device, so as to better meet the demodulation requirement of the terminal device.

In a specific embodiment, the first information may be further used to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in the time domain. Further, the terminal device blindly detects DCI in the PDCCH repeatedly transmitted each time according to the number of times of repeated transmission of the PDCCH in the time domain. Therefore, the time-frequency resources of the PDCCH can be flexibly configured in the frequency domain and the time domain, so that the subsequent demodulation success rate of the terminal equipment is higher.

In one example, the number of repeated transmissions of the PDCCH in the time domain is related to the traffic type of the terminal device; for example, when the service type of the terminal device is a delay-sensitive service type, the number of times of retransmission of the PDCCH in the time domain is a fifth value; when the service type of the terminal equipment is a service type which is not sensitive to time delay, the repeated transmission times of the PDCCH on the time domain is a sixth value; wherein the fifth value is less than the sixth value.

In another example, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; for example, when the terminal device is a third distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is a seventh value; when the terminal device is a fourth distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is an eighth value; wherein the third distance is greater than the fourth distance, and the seventh value is greater than the eighth value. Therefore, the problem that the services of some remote terminal equipment cannot be accessed can be reduced.

In this application, the network device may adopt an adaptive priority policy based on the above multiple situations, for example, a carrier candidate set mode is preferentially selected for a delay-sensitive traffic type, and a repeated transmission number candidate set is preferentially selected for a delay-insensitive traffic type.

By adopting the communication method provided by the application, the carrier occupied by the PDCCH can be configured for the terminal equipment by combining with the carrier aggregation, so that the covering capability of the PDCCH can be improved, the demodulation success rate of the terminal equipment is improved, and the transmission delay is reduced.

Based on the above embodiments, a specific example is used to illustrate the beneficial effects of the communication method provided by the present application. For example, the PDCCH maximum carrier bundling (aggregation) Cmax configured by the network device is 8. For the near-end terminal equipment, the middle-end terminal equipment and the far-end terminal equipment, the network equipment adopts different PDCCH carrier numbers C to carry out scheduling so as to successfully demodulate DCI of the terminal equipment, thereby meeting the balance of system capacity and service coverage. For example, if the number C of carriers used by the near-end terminal device is 1; the number C of carrier waves adopted by the middle-end terminal equipment is 2; the remote terminal equipment adopts carrier number C to be 8. Under the mechanism, the channel code rate is reduced by utilizing the multi-carrier bundling of the carrier aggregation technology, and the control information can be successfully and blindly detected by the remote terminal equipment in only one frame. As shown in the schematic diagram of the terminal device blind detection DCI shown in fig. 5, it can be obtained that the terminal device performs blind detection for 15 times all at the 0 th frame, and the remote terminal device also performs blind detection at the 0 th frame, so that the demodulation success rate of the terminal device can be improved, and the time delay is reduced.

Based on the above embodiments, the present application further provides a terminal device, where the network device is applied to the communication system shown in fig. 1. The network device may be used to implement the functions of the network device in the communication method shown in fig. 4. Referring to fig. 6, the network device may include a processing unit 601 and a transceiving unit 602. Specifically, the method comprises the following steps:

the processing unit 601 is configured to determine first information, where the first information is used to indicate a carrier candidate set occupied by a PDCCH, and the carrier candidate set includes at least one carrier; the transceiver 602 is configured to send the first information to a terminal device.

In an optional implementation manner, the number of the at least one carrier is related to a service type of the terminal device;

when the service type of the terminal equipment is a delay sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal equipment is a time delay insensitive service type, the number of the at least one carrier is a second value; wherein the first value is greater than the second value.

In another optional implementation, the number of the at least one carrier is related to a distance between the terminal device and the network device; when the terminal equipment is at a first distance from the network equipment, the number of the at least one carrier is a third value; when the terminal equipment is at a second distance from the network equipment, the number of the at least one carrier is a fourth value; wherein the first distance is greater than the second distance, and the third value is greater than the fourth value.

Optionally, the first information is further used to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in the time domain.

In one example, the number of repeated transmissions of the PDCCH in the time domain is related to the traffic type of the terminal device; when the service type of the terminal equipment is a delay sensitive service type, the number of times of repeated transmission of the PDCCH in the time domain is a fifth value; when the service type of the terminal equipment is a service type which is not sensitive to time delay, the repeated transmission times of the PDCCH on the time domain is a sixth value; wherein the fifth value is less than the sixth value.

In another example, the number of repeated transmissions of the PDCCH in the time domain is related to the distance between the terminal device and the network device; when the terminal device is a third distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is a seventh value; when the terminal device is a fourth distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is an eighth value; wherein the third distance is greater than the fourth distance, and the seventh value is greater than the eighth value.

Based on the above embodiments, the present application further provides a terminal device, where the terminal device is applied to the communication system shown in fig. 1. The terminal device may be configured to implement the function of the terminal device in the communication method shown in fig. 4. Referring to fig. 7, the terminal device may include a transceiving unit 701 and a processing unit 702. Specifically, the method comprises the following steps:

the transceiver 701 is configured to receive first information from a network device, where the first information is used to indicate a carrier candidate set occupied by a PDCCH, and the carrier candidate set includes at least one carrier; the processing unit 702 is configured to blind-detect DCI in the PDCCH on the at least one carrier according to the first information.

In an optional implementation manner, the number of the at least one carrier is related to a service type of the terminal device; when the service type of the terminal equipment is a delay sensitive service type, the number of the at least one carrier is a first value; when the service type of the terminal equipment is a time delay insensitive service type, the number of the at least one carrier is a second value; wherein the first value is greater than the second value.

Optionally, the first information is further configured to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in a time domain; further, the processing unit 702 is further configured to blindly detect DCI in the PDCCH that is repeatedly transmitted each time according to the number of times that the PDCCH is repeatedly transmitted in the time domain.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Based on the above embodiments, the embodiments of the present application further provide a network device, where the network device is configured to implement the function of the network device in the communication method shown in fig. 4. Referring to fig. 8, the network device 800 includes: a transceiver 801 and a processor 802, wherein:

the processor 802 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor 802 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. When the processor 802 implements the above functions, it may be implemented by hardware, or may be implemented by hardware executing corresponding software.

The transceiver 801 and the processor 802 are connected to each other. Optionally, the transceiver 801 and the processor 802 are connected to each other through a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

Optionally, the network device may further include a memory 803, and the memory 803 is used for storing programs and the like. In particular, the program may include program code comprising computer operating instructions. The memory 803 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 802 executes the application program stored in the memory 803 to implement the above functions, thereby implementing the communication method shown in fig. 4.

Specifically, when the network device implements the function of the network device in the communication method shown in fig. 4, the method may include:

the processor 802 is configured to determine first information indicating a carrier candidate set occupied by a PDCCH, where the carrier candidate set includes at least one carrier; the transceiver 801 is configured to send the first information to a terminal device.

Based on the above embodiments, the embodiments of the present application further provide a terminal device, where the terminal device is configured to implement the function of the terminal device in the communication method shown in fig. 4. Referring to fig. 9, the terminal apparatus 900 includes: a transceiver 901 and a processor 902, wherein:

the processor 902 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor 902 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof. When the processor 902 implements the above functions, the functions may be implemented by hardware, or may be implemented by hardware executing corresponding software.

The transceiver 901 and the processor 902 are connected to each other. Optionally, the transceiver 901 and the processor 902 are connected to each other through a bus 904; the bus 904 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

Optionally, the terminal device may further include a memory 903, where the memory 903 is used for storing programs and the like. In particular, the program may include program code comprising computer operating instructions. The memory 903 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor 902 executes the application program stored in the memory 903 to implement the above functions, thereby implementing the communication method shown in fig. 4.

Specifically, when the terminal device implements the function of the terminal device in the communication method shown in fig. 4, the method may include:

the transceiver 901 is configured to receive first information from a network device, where the first information is used to indicate a carrier candidate set occupied by a PDCCH, and the carrier candidate set includes at least one carrier; the processor 902 is configured to blind detect DCI in the PDCCH on the at least one carrier according to the first information.

Optionally, the first information is further configured to indicate a candidate set of retransmission times corresponding to the PDCCH, where the candidate set of retransmission times includes the retransmission times of the PDCCH in a time domain; further, the processor 902 is further configured to blindly detect DCI in the PDCCH that is repeatedly transmitted each time according to the number of times that the PDCCH is repeatedly transmitted in the time domain.

Based on the above embodiments, the present application provides a communication system, which may include the network device and the terminal device related to the above embodiments.

The embodiment of the present application further provides a computer-readable storage medium, which is used for storing a computer program or instructions, and when the computer program or instructions is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

The embodiment of the present application further provides a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the communication method provided by the above method embodiment.

The embodiment of the application also provides a chip, wherein the chip is coupled with the memory and is used for realizing the communication method provided by the embodiment of the method.

The embodiment of the present application further provides a chip system, where the chip system includes a processor, and is configured to support the communication device to implement the above-mentioned functions. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or order. In the description of the present application, "at least one" means one or more, and a plurality means two or more.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method of communication, comprising:

the network equipment determines first information, wherein the first information is used for indicating a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set comprises at least one carrier;

and the network equipment sends the first information to terminal equipment.

2. The method of claim 1, wherein the number of the at least one carrier is related to a traffic type of the terminal device;

when the service type of the terminal equipment is a delay sensitive service type, the number of the at least one carrier is a first value;

when the service type of the terminal equipment is a time delay insensitive service type, the number of the at least one carrier is a second value;

wherein the first value is greater than the second value.

3. The method according to claim 1 or 2, wherein the number of said at least one carrier is related to the distance of said terminal device from said network device;

when the terminal equipment is at a first distance from the network equipment, the number of the at least one carrier is a third value;

when the terminal equipment is at a second distance from the network equipment, the number of the at least one carrier is a fourth value;

wherein the first distance is greater than the second distance, and the third value is greater than the fourth value.

4. The method of any one of claims 1-3, wherein the first information is further used for indicating a candidate set of number of repeated transmissions corresponding to the PDCCH, and the candidate set of number of repeated transmissions includes the number of repeated transmissions of the PDCCH in a time domain.

5. The method of claim 4, wherein the number of repeated transmissions of the PDCCH in the time domain is related to a traffic type of the terminal device;

when the service type of the terminal equipment is a delay sensitive service type, the number of times of repeated transmission of the PDCCH in the time domain is a fifth value;

when the service type of the terminal equipment is a service type which is not sensitive to time delay, the repeated transmission times of the PDCCH on the time domain is a sixth value;

wherein the fifth value is less than the sixth value.

6. The method of claim 4 or 5, wherein the number of repeated transmissions of the PDCCH in the time domain is related to the proximity of the terminal device to the network device;

when the terminal device is a third distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is a seventh value;

when the terminal device is a fourth distance away from the network device, the number of times of repeated transmission of the PDCCH in the time domain is an eighth value;

wherein the third distance is greater than the fourth distance, and the seventh value is greater than the eighth value.

7. A method of communication, comprising:

the method comprises the steps that terminal equipment receives first information from network equipment, wherein the first information is used for indicating a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set comprises at least one carrier;

and the terminal equipment blindly detects the downlink control information DCI in the PDCCH on the at least one carrier according to the first information.

8. The method of claim 7, wherein the number of the at least one carrier is related to a traffic type of the terminal device;

wherein the first value is greater than the second value.

9. The method according to claim 7 or 8, wherein the number of said at least one carrier is related to the distance of said terminal device from said network device;

10. The method of any one of claims 7-9, wherein the first information is further used for indicating a candidate set of number of repeated transmissions corresponding to the PDCCH, and the candidate set of number of repeated transmissions includes the number of repeated transmissions of the PDCCH in a time domain;

the method further comprises the following steps:

and the terminal equipment blindly detects the DCI in the PDCCH repeatedly transmitted each time according to the repeated transmission times of the PDCCH in the time domain.

11. The method of claim 10, wherein the number of repeated transmissions of the PDCCH in the time domain is related to a traffic type of the terminal device;

wherein the fifth value is less than the sixth value.

12. The method of claim 10 or 11, wherein the number of repeated transmissions of the PDCCH in the time domain is related to the proximity of the terminal device to the network device;

13. A communications apparatus, comprising:

a processing unit, configured to determine first information, where the first information is used to indicate a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set includes at least one carrier;

and the transceiving unit is used for sending the first information to the terminal equipment.

14. The communications apparatus of claim 13, wherein the number of the at least one carrier is related to a traffic type of the terminal device;

wherein the first value is greater than the second value.

15. A communications apparatus as claimed in claim 13 or 14, wherein the number of said at least one carrier is related to the distance of the terminal device from the network device;

16. The communications apparatus of any of claims 13-15, wherein the first information is further configured to indicate a candidate set of number of repeated transmissions corresponding to the PDCCH, the candidate set of number of repeated transmissions including the number of repeated transmissions of the PDCCH in a time domain.

17. The communications apparatus of claim 16, wherein the number of repeated transmissions of the PDCCH in the time domain is related to a traffic type of the terminal device;

wherein the fifth value is less than the sixth value.

18. The communications apparatus of claim 16 or 17, wherein the number of repeated transmissions of the PDCCH in the time domain is related to how far the terminal device is from the network device;

19. A communications apparatus, comprising:

a receiving and sending unit, configured to receive first information from a network device, where the first information is used to indicate a carrier candidate set occupied by a Physical Downlink Control Channel (PDCCH), and the carrier candidate set includes at least one carrier;

and a processing unit, configured to blind-detect, on the at least one carrier, the downlink control information DCI in the PDCCH according to the first information.

20. The communications apparatus of claim 19, wherein the number of the at least one carrier is related to a traffic type of the terminal device;

wherein the first value is greater than the second value.

21. A communications apparatus according to claim 19 or 20, wherein the number of said at least one carrier is related to the distance of the terminal device from the network device;

22. The communications apparatus of any of claims 19-21, wherein the first information is further configured to indicate a candidate set of number of repeated transmissions corresponding to the PDCCH, the candidate set of number of repeated transmissions including the number of repeated transmissions of the PDCCH in a time domain;

the processing unit is further configured to:

23. The communications apparatus of claim 22, wherein the number of repeated transmissions of the PDCCH in the time domain is related to a traffic type of the terminal device;

wherein the fifth value is less than the sixth value.

24. The communications apparatus of claim 22 or 23, wherein the number of repeated transmissions of the PDCCH in the time domain is related to how far the terminal device is from the network device;

25. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-6 or perform the method of any of claims 7-12.